Dilog DL6507 10uA

[bluetof]

Got one of these

Called to a fault where old voltage type RCD is tripping. Set the scale to 400ma but the reading states OL. Eventually worked out that the central heating system appears to be the problem.

Disconnected the earth to the heating system and reading falls back to 1.6ma. Connect the earth and reading is OL.

I am clamping the neutral and live main incoming. Am I doing this correctly ????

What is the opinion of these earth leakage clamps ??????????? GuinnessGuinnessGuinnessGuinnessGuinness

 

[monkey5]

Got one of theseCalled to a fault where old voltage type RCD is tripping. Set the scale to 400ma but the reading states OL. Eventually worked out that the central heating system appears to be the problem.

Disconnected the earth to the heating system and reading falls back to 1.6ma. Connect the earth and reading is OL.

I am clamping the neutral and live main incoming. Am I doing this correctly ????

What is the opinion of these earth leakage clamps ??????????? GuinnessGuinnessGuinnessGuinnessGuinness

i might be wrong but i would have clamped the earth to read whats leaking down that.

 

[Andy™]

i might be wrong but i would have clamped the earth to read whats leaking down that.

surely you want to clamp the L&N to see what the imbalance is, after all, if you clamp the earth, the current may be taking a different route

 

[ian932]

https://www.youtube.com/embed/5hL13UjRSoY?feature=oembed

 

[m4tty]

Does OL on the display mean OPEN LINE or something else. Is the scale set too high for the meter to register a reading so it's saying OL?

Cheers

 

[m4tty]

Also in the video above that ian932 posted the bloke tested a ps3 which was class 1 but the Xbox is class 2 so why does the ps3 have a Cpc and the Xbox not need one. Where does any leakage go on the Xbox?

Might be a stupid question but thought I'd ask anyway lol

Cheers

 

[ProDave]

A couple of obvious points:

You get a OL reading on the 400mA scale when the heating is connected. So there's a FAULT on the heating circuit. What tests have you done on that circuit?

If the reading is OL on the 400mA scale, switch to a higher scale until you DO get a reading within range.

I'm willing to bet you have a N-E short on the heating circuit, so when it's earth is connected, a share of the neutral current, possibly of the whole house, is going down the earth.

Either way you have found the faulty circuit, you now need to find where and what the fault is and fix it.

 

[professional]

You need to learn how to use your clamp meter.

ALWAYS start on the highest range and work down ....

 

[m4tty]

You need to learn how to use your clamp meter.ALWAYS start on the highest range and work down ....

That's what I'm trying to do .. Learn how to use it. Does OL mean you need to select a lower scale or higher scale?

This is an old thread Dave that I revived instead of starting a new one as it was connected.

Does OL mean the scale is too low or high as I think mine may have a problem ?

Cheers

 

[ProDave]

That's what I'm trying to do .. Learn how to use it. Does OL mean you need to select a lower scale or higher scale? This is an old thread Dave that I revived instead of starting a new one as it was connected.

Does OL mean the scale is too low or high as I think mine may have a problem ?

Cheers

Doh, should have looked at the date.

ALWAYS start on the highest scale and reduce to a lower scale as needed, i.e always start on 100A scale or whatever your meter has.

OL usually means "overload" i.e there's more current flowing than it can display on that range.

 

[professional]

OL refers to Over/Outside Limit i.e. over the limit of the scale selected.

 

[m4tty]

Thanks for the replies. I always select highest scale and work backwards. My dad taught me that as a kid

The problem is the meter is reading OL on the 100a setting and I can't find the instruction manual that came with it.

Looked on the net but not found anything so any comments appreciated

Thanks

 

[ProDave]

OL on 100A scale? Well I don't really think it's possibly drawing more than 100A is it?

For a sanity check I would want to be trying a different meter. I still have an old TMK analogue meter, you know one with a mechanical pointy thing that moves along a scale that I use as a check if there is any doubt about my more modern meter telling me odd things.

Had a quick google and I can't find a manual, just a specification sheet, which in one place says maximum current 100A then on the next page says 60A

EDIT

Here's the user manual http://1.234.22.71/datasheets/310556_442175.pdf

It says "Overload Indication: The left digit is blinking"

Makes no mention of the display reading "OL"

so about as much use as a chocolate tea pot.

 

[m4tty]

I found the same doc Dave and yeah it's pretty useless. There's a on/off switch on the side of the meter which does something but not turn the meter on/off think it may turn clamp on/off. This had been switched to off so it's working as it should now so my fault. Thanks for the reply tho Dave and prof

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Just been having a play with the meter as got an rcd tripping problem coming up with pond pumps etc involved so ive made a lead up with conductors separate so can clamp live and neutral and earth separately.